Lead removal by a reusable gel cation exchange resin containing nano-scale zero valent iron

Chanthapon, Nopphorn; Sarkar, Sudipta; Kidkhunthod, Pinit; Padungthon, Surapol

doi:10.1016/j.cej.2017.08.133

Cited by 56 publications

(23 citation statements)

References 53 publications

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“…[38] The schematic structure of S-GA is shown in Figure S2, Supporting Information; the high density of negative charge of SO 3 could attract the Pb 2+ in the aqueous solution to form precipitates. [39] A brief computation was conducted to assess the binding strength of S-GA with Pb 2+ (inset of Figure 1a). We presume at least two sulfonate groups will bind each Pb 2+ to retain the charge neutrality.…”

Section: Characterization and Lead Adsorbing Properties Of S-gamentioning

confidence: 99%

Sulfonated Graphene Aerogels Enable Safe‐to‐Use Flexible Perovskite Solar Modules

et al. 2021

Advanced Energy Materials

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single-junction PVSCs and a champion efficiency of 29.5% realized for perovskitebased tandem solar cells. [1][2][3][4][5][6][7] Meanwhile, impressive strides have been made to enhance their stability and scale up, [8][9][10][11][12][13][14][15][16][17][18][19] which improve their feasibility to be used for next-generation photovoltaics (PVs). Nonetheless, the toxicity of lead-containing components in high-performance PVSCs is the main hurdle that impedes their potential deployment. [20][21][22] When damaged by irresistible natural factors or external forces, [23,24] the toxic lead in PVSCs readily leaches into the environment, posing a threat to human health. [25,26] Recently, physical or chemical barrier layers were employed to suppress the potential lead leakage in PVSCs. [27][28][29][30] For instance, a self-healing epoxy resin had been applied as a physical barrier layer to minimize the direct exposure of perovskite to the rain for suppressing the lead leakage. [23] Cation exchange resins had been used as lead-absorbing materials to efficiently trap lead through the strong chemical bonding between lead and sulfonate group. [27,28] Moreover, the phosphoric acid based lead absorbing materials had also been employed to prevent the lead leakage. [29] In all these reports, they focused on PVSCs based on rigid substrates for outdoor applications without mentioning the even more challenging task of preventing lead leakage in flexible devices. To have the capability of effectively trapping Pb 2+ in flexible devices to a safe-to-use level is very critical because most of these devices are used in applications related to our daily life, which poses a direct threat to human health.According to the European Union and United States (US) regulations for restricted toxic substances concentration on the perweight basis, the lead concentration from a flexible perovskite PV device is estimated to be more than 50 times higher than that from the rigid device due to the lighter weight of flexible substrates, making the prevention of lead leakage in flexible PVSCs more challenging. [31] Moreover, the lead trapping materials should not damage the light weight, flexibility, performance, and stability of flexible perovskite solar modules (PVSMs) for commercial deployment. To achieve regulatory compliance for flexible devices, it is imperative to develop effective lead-adsorbing materials with good flexibility, light weight, and high lead adsorption capacity. Graphene aerogels (GA) featured with excellent mechanical strength and flexibility, light weight, large specific area, high adsorption capacity, and low cost are ideal adsorbentsThe potential leakage of lead from degraded perovskite photovoltaics poses a threat to the ecosystem and human health, which is a severe hurdle for their commercialization, especially for flexible modules that are often integrated in applications used in daily living. To trap the lead from degraded flexible perovskite solar modules (PVSMs), sulfonated graphene aerogels mixed with polydimethylsiloxane are ...

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Section: Characterization and Lead Adsorbing Properties Of S-gamentioning

confidence: 99%

Sulfonated Graphene Aerogels Enable Safe‐to‐Use Flexible Perovskite Solar Modules

et al. 2021

Advanced Energy Materials

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“…At higher concentrations the expected concentrating effect of sorption/desorption may be too low to be competitive against other processes such as solvent extraction (especially for valuable metals) or precipitation (for hazardous metals). Many ionexchange and chelating resins have been designed for hydrometallurgy and analytical applications [6][7][8][9]. Alternatively solvent impregnated resins can be used for metal recovery combining the high stability of porous synthetic resin and the extraction properties of solvent extractants [10,11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and adsorption characteristics of grafted hydrazinyl amine magnetite-chitosan for Ni(II) and Pb(II) recovery

Hamza

Wei

Mira

et al. 2019

Chemical Engineering Journal

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Synthesis and adsorption characteristics of grafted hydrazinyl amine magnetite-chitosan for Ni(II) and Pb(II) recovery. Abstract:The sorption properties of a functionalized magnetic chitosan sorbent have been investigated for the recovery of Ni(II) and Pb(II) from aqueous solutions. This material was prepared by one-pot co-precipitation of chitosan with formation of magnetic core, followed by a series of grafting step to immobilize hydrazinyl amine derivative at the surface of chitosan layer. The physico-chemical characteristics of this composite material were investigated using FTIR, XRD, thermogravimetric, titration, elemental analyses. In a second step, the sorbent was tested for heavy metal sorption on synthetic solutions through the study of pH effect, sorption isotherms and uptake kinetics, selective sorption (in function of pH), metal desorption and sorbent recycling. Sorption isotherms were modeled using the Sips equation while the uptake kinetics was fitted by the pseudo-second order rate equation. The sorption capacity reached 4.3 mmol Ni g -1 and 2.5 mmol Pb g -1 but the sorbent was more selective to Pb(II) over Ni(II), especially in acidic conditions. The decrease in sorption capacity at the fifth cycle does not exceed 8 %. In the final step of the study, the sorbents were successfully applied for metal recovery from multi-metal synthetic solution and from a contaminated stormwater collected in a local mining area.

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“…[2] Therefore, removal of toxic substancesf rom wastewater is required for human health and environmental protection. [3] For this purpose, plenty of conventional methods such as absorption, [4] photodegradation, [5] ion exchange, [6] and membranef iltration [7] are commonly used. Among them,a bsorption is regarded as the most favorable method by virtue of its simplicity,low process cost, and high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Ferrocene‐Functionalized Silsesquioxane‐Based Porous Polymer for Efficient Removal of Dyes and Heavy Metal Ions

Yang

Liu

2018

Chemistry A European J

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A novel ferrocene-linked organic-inorganic hybrid porous polymer has been successfully prepared by Friedel-Crafts reaction of octavinylsilsesquioxane and ferrocene. The relationship of structure/property was investigated by FTIR, NMR, XRD, Brunauer-Emmett-Teller (BET) etc. The obtained porous polymer exhibited a high surface area of 1015 m g and a hierarchical pore structure. It could be applied to wastewater treatment with the absorption capacity of up to 1683 mg g for Congo red (CR), 1083 mg g for crystal violet (CV), 1003 mg g for rhodamine B (RB), 441 mg g for methylene blue (MB), 191 mg g for Hg , and 328 mg g for Pb . Remarkably, it could be easily regenerated and the removal efficiency remains almost constant even after six cycles.

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Lead removal by a reusable gel cation exchange resin containing nano-scale zero valent iron

Cited by 56 publications

References 53 publications

Sulfonated Graphene Aerogels Enable Safe‐to‐Use Flexible Perovskite Solar Modules

Sulfonated Graphene Aerogels Enable Safe‐to‐Use Flexible Perovskite Solar Modules

Synthesis and adsorption characteristics of grafted hydrazinyl amine magnetite-chitosan for Ni(II) and Pb(II) recovery

Ferrocene‐Functionalized Silsesquioxane‐Based Porous Polymer for Efficient Removal of Dyes and Heavy Metal Ions

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